Load-operating arm



L. P. HYNES.

LOAD OPERATING ARM.

APPLICATION man ocT. 18, 191e.

Patented Mar. 9, 1920.

UNITED sTATn's PATENT oFFIoE.

LEE P. HYNES, F ALBANY, YORK, ASSIGNOR TO CONSOLIDATED CAR-HEATING COMPANY, 0F ALBANY, N EV YORK, A CORPORATION OF WEST VIRGINIA.

LOAD-ornaa'rms ARM.

To all whom it may concern.'

Be it known that I, LEE P. HrNn-s, a citizen of the United States, residing at Albany, in the count-y of Albany and State of New York, have invented certain new and useful Improvements in Load-Operating Arms, the

following being a full, clear, and exact dis` Fig. 3 is a perspective view partly broken away g Fig. 4E is a transverse section on the line 4-4 of Fig. l;

Fig. 5 is a detail, and

Fig. 6 shows the application of my device as a means for enabling a pressure engine to operate a door.

My invention relates to an arm which is adapted to be attached in a radial position to a shaft and to serve as an agent by which the shaft may impart reciprocating motion to a door, gate, valve or similar device which constitutes the load which the shaft is to operate. It is frequently the case that in such a situation the arm is desirably capable of longitudinal contraction against the force of an expanding spring so that the door or other load can be moved a certain degree independently of the push or pull of the arm upon it. I have incorporated such a feature in my organization.

Referring to the drawing, A represents the fundamental part of the arm which is in the form of a sheath in which telescopes the extension part B that is connected to the door F, or other object by means of a pivot and slide such as is well known.

The sheath part is formed of sheet metal which is bent over at its top and bottom edges as appears in Figs. 3 and 4. The overturned portion forms a tubular casing to contain a helical spring H and it also forms a channel or guideway in which slides the extension part B. The eXtreme edges of the sheet metal of which the sheath isformed are turned out to have a resilient bearing on the part B. That part can still slide freely in the sheath but is maintained in place Specification of Letters Patent. l Patented Mar, 9, 1920,

Application led October 18, 1918. Serial No. 258,750.

against the flat portion of the-sheath. In each'tubular part is a helical spring H and at the rear end a pin K is passed through both tubular parts to form a stop for the rear ends of the springs At the forward end of the sheath, there are two U-shaped lugs P,P riveted to the part B in line respectively with the ends of the springs, while a pin K1, similar to K, is passed through the two tubular parts in front of the lugs P, P to serve as a front stop for the part B when pressed by the springs. It is manifest that if the springs are under compression they will abut against the lugs P, P on the extension part B and tend to press it outward or away from the sheath so far as is permitted by the stop-pin K1. Conversely they will yield and allow the part B to be pushed into the sheath and thereby cause a contraction in length of the arm as a whole. On the back of the sheath is riveted a plate C with a hub D thereon in which is a heX- agonal hole to receive oneend of the operating shaft. The rivet holes in plate C are countersunk, as shown in Fig. 5, and the corresponding holes in the sheath are punched with a conical flange that enters the countersunk portion of the holes in the plate. By this means a secure torsion-resisting connection between the plate and the sheath is secured while leaving la smooth interior surface inside the sheath against which the part B bears.

The advantages of this construction are that it affords a simple, cheap arrangement that is readily assembled and reassembled to meet different conditions of use. The sheath is of sheet metal easily bent into the fbrm shown, which aords the required strength in both a transverse andlateral direction, while at the same time an appropriate slotted chamber for the spring is afforded. together with the guideway for the move ment of the sliding part. The said sliding part is merely a length of standard rolled or forged wrought metal as distinguished from a casting, it can be cut of any desired length from stock available in almost any machine shop, and if necessary can be readily given a bend or offset to make it fit the particular job in hand. To take the arm apart it is onlv necessary to remove the pin K1.

What I claim as new and desire to secure by Letters Patent is:

1. A load operating arm comprising a Sheet metal Sheath part rhaving its edges bent over to forni a guideivay, and an eXtension part formed of flat rolled or forged metal, said bent over edges having a resilient bearing upon said extension part.

2. A load-operating arm comprising a sheath part formed of sheet inetal bent over at each edge to forni a gnideivay, anda flat rolled or forged extension part contained in said guideway.v

v 3. A load-operating arin comprising a sheath part of Sheet metal with its edges bent over to forni,spring easings, springs in said casings, and a flat extension part engaging the said springs and guided along said sheath part. Y

d. A load-operating arin comprising a sheath part of sheet inetal bent over at its edges to form spring easings and guides, springs in Said oasings and a 'Hat extension part Contained in said guides and engaging said springs.

5. A load-operating arni comprising a Sheath part having on each edge a Slotted tubular ofset and an extension part of Hat metal guided to slide along the sheath.

tions.

7 A load-operating arm comprising a ,sheath part formed of sheet metal bent over one face at each edge to forni aguidevvay, a shaft recelving device secured to the other face of said sheath, and a flat extension part contained in and projecting from the said guidevvay.

8. A load operating arin comprising a Sheath part formed of Sheet metal bent over one face at each edge to 'for-in a guideway, ineans for eonneoting Said sheath part to a shaft extending at a right angle thereto, anda at extension part contained in and projecting from the said guidevvay.

Signed at Albany, county of Albany, State of New York, this 15th day of October, 1918.

LEE P. HYNFS. Y 

